Chinese officials lashed out at Sen. Ed Markey, D-Mass., for leading an unannounced delegation of lawmakers to Taiwan.
"Ignoring China's repeated protests & firm opposition, US lawmaker Ed Markey insisted on visiting China’s Taiwan region, this plainly violates the One China Principle & the China-US joint communiqués, it is an intrusion of China’s sovereignty & territorial integrity," Consul General of China to Karachi Li Bijian said on Twitter.
The comments come after a group of five U.S. lawmakers landed in Taiwan Sunday, less than two weeks after House Speaker Nancy Pelosi became the highest-level U.S. official to visit the country in over 20 years.
Pelosi's trip was quickly condemned by the Chinese, who launched a series of military drills and exercises in the Taiwan Strait in response.
The group of lawmakers, which includes Democratic Reps. John Garamendi of California, Alan Lowenthal of California, and Don Beyer of Virginia, and Republican Rep. Amata Radewagen of American Samoa, met with Taiwanese officials Sunday, who enthusiastically welcomed the American visitors.
"Vice Minister Yui extended the warmest of welcomes to Taiwan's longstanding friend Sen. Markey & his cross-party delegation," Taiwan's Ministry of Foreign Affairs said on Twitter Sunday. "We thank the like-minded US lawmakers for the timely visit & unwavering support."
But the visit set off a new round of heated rhetoric from Chinese officials, who claim that the self-governed island is part of Chinese territory. The U.S. has agreed not to hold formal diplomatic relations with Taiwan, but it has long provided support to the island, aimed at helping it defend itself from China.
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"China firmly opposes any kind of official ties between the US & Taiwan region," Chinese Ambassador to the Association of Southeast Asian Nations Deng Xijun said on Twitter Monday. "China will take countermeasures in response to the US' provocations to defend its sovereignty &territorial integrity."
China renewed its large-scale military drills in response to the visit.